CN112963493B - a damping rod - Google Patents

Abstract

The present invention provides a damping rod, comprising a cylinder assembly, a first piston assembly, a second piston assembly, a first bushing and a second bushing, the cylinder assembly comprising a first cylinder and a second cylinder, One end of the second cylinder is connected to the first cylinder, the first piston assembly is slidably connected to the inner wall of the first cylinder, and the second piston assembly is connected to the inner wall of the second cylinder. The inner wall is slidably connected, the first bushing is connected to the end of the first piston assembly away from the first cylinder, and the second bushing is connected to the end of the second piston assembly away from the second cylinder At one end, the first bushing is arranged opposite to the second bushing. In the present application, by setting up a two-stage stepped cylinder structure, the vibration generated by the torque can be effectively attenuated, and at the same time, with piston components of different sizes, the shock absorption effect of large damping and high stiffness can be obtained at low frequency and large amplitude, and the high frequency is small. The shock absorption effect of small damping and small stiffness is obtained during the amplitude.

Description

a damping rod

technical field

The invention relates to the field of dampers, in particular to a damping pull rod.

Background technique

At present, most of the damping rods can only realize the shock absorption function in a single axis, and the working range of providing damping force is relatively limited, which cannot well meet the good shock absorption characteristics required by the vibration excitation generated by the operating equipment under complex working conditions. . At the same time, there is not only one form of vibration. Axial vibration is sometimes accompanied by torsional vibration. A damping rod with a single axial damping cannot attenuate torsional vibration. It is often necessary to install a torsional shock absorber, which not only increases the cost, but also increases the cost. Increase the difficulty of installation.

SUMMARY OF THE INVENTION

Based on this, in order to solve the problem that the damping rod is not effective for multi-dimensional shock absorption, the present invention provides a damping rod, and its specific technical scheme is as follows:

A damping rod includes a cylinder assembly, a first piston assembly, a second piston assembly, a first bushing and a second bushing, the cylinder assembly including a first cylinder and a second cylinder, the second One end of the cylinder is connected in the first cylinder, the first piston assembly is slidably connected with the inner wall of the first cylinder, the second piston assembly is slidably connected with the inner wall of the second cylinder, The first bushing is connected to the end of the first piston assembly away from the first cylinder, the second bushing is connected to the end of the second piston assembly away from the second cylinder, the The first bushing is arranged opposite to the second bushing.

The above-mentioned damping rod can effectively attenuate the vibration generated by the torque by setting up a two-stage stepped cylinder structure, and at the same time cooperate with piston components of different sizes, it can obtain large damping and high stiffness shock absorption at low frequency and large amplitude. The shock absorption effect of small damping and small stiffness is obtained at high frequency and small amplitude.

Further, the first piston assembly includes a first piston rod, a first piston head and a first piston ring, and the first bushing and the first piston head are respectively connected to both ends of the first piston rod , the first piston ring is sleeved on the outer circumference of the first piston head, and the first piston head is slidably connected to the first cylinder through the first piston ring; the second piston assembly includes A second bushing, a second piston rod, a second piston head and a second piston ring, the second bushing and the second piston head are respectively connected to both ends of the second piston rod, the second A piston ring is sleeved on the outer periphery of the second piston head, and the second piston head is slidably connected in the second cylinder through the second piston ring.

Further, the cylinder assembly further includes a first end cover, a second end cover, and a sealing cover,

The first end cover and the sealing cover are respectively connected to both ends of the first cylinder, and the first end cover is provided with a first through hole that is adapted to the first piston rod, so The sealing cover is provided with a second through hole adapted to the second cylinder;

A third through hole matching with the second piston rod is opened on the second end cover.

Further, the outer diameter of the first piston assembly is larger than the outer diameter of the second piston assembly.

Further, damping holes are provided on both the end face of the first piston head and the end face of the second piston head.

Further, the first bushing and the second bushing are both vulcanized into one by the outer sleeve, the shock-absorbing rubber ring and the inner sleeve.

Further, each outer sleeve is fixedly connected with each corresponding piston rod, and the center axis of each outer sleeve is perpendicular to the center axis of each corresponding piston rod.

Further, the cylinder barrel assembly further includes a plurality of arc springs, and a plurality of second protrusions are evenly distributed in the direction of the second cylinder barrel and the first cylinder barrel toward the second piston rod, so The part connecting the first cylinder and the second cylinder is evenly distributed with a plurality of first protrusions that are adapted to the second protrusions, and the arc spring is connected to the first protrusions and the second protrusions. between the second protrusions.

Further, the first cylinder is communicated with the second cylinder.

Further, both the first cylinder and the second cylinder are filled with damping medium.

Description of drawings

The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the embodiments. Like reference numerals designate corresponding parts throughout the different views.

1 is a schematic structural diagram of a damping pull rod in one of the embodiments of the present invention;

FIG. 2 is a schematic structural diagram of a second piston assembly of a damping rod in one embodiment of the present invention.

Description of reference numbers:

11, the first cylinder; 12, the second cylinder; 13, the first end cover; 14, the second end cover; 15, the sealing cover; 16, the arc spring; 17, the sealing ring; 20, the first piston assembly 30, the second piston assembly; 31, the second piston rod; 32, the second piston head; 33, the second piston ring; 34, the damping hole; 40, the first bushing; Rubber ring; 43. Inner casing.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, and do not limit the protection scope of the present invention.

It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The "first" and "second" mentioned in the present invention do not represent a specific quantity and order, but are only used for the distinction of names.

As shown in Figures 1-2, a damping rod in an embodiment of the present invention includes a cylinder assembly, a first piston assembly 20, a second piston assembly 30, a first bushing 40 and a second bushing, the said The cylinder assembly includes a first cylinder 11 and a second cylinder 12. One end of the second cylinder 12 is connected to the first cylinder 11. The first piston assembly 20 is connected to the first cylinder 12. 11 , the second piston assembly 30 is slidably connected to the inner wall of the second cylinder 12 , and the first bushing 40 is connected to the first piston assembly 20 away from the first cylinder 11 The second bushing is connected to the end of the second piston assembly 30 away from the second cylinder 12, and the first bushing 40 is arranged opposite to the second bushing.

The above-mentioned damping rod can effectively attenuate the vibration generated by the torque by setting up a two-stage stepped cylinder structure, and at the same time cooperate with piston components of different sizes, it can obtain large damping and high stiffness shock absorption at low frequency and large amplitude. The shock absorption effect of small damping and small stiffness is obtained at high frequency and small amplitude.

Specifically, the connections between the first cylinder 11 , the second cylinder 12 , the first piston assembly 20 , and the second piston assembly 30 are all sealed connections.

In one embodiment, the first piston assembly 20 includes a first piston rod, a first piston head and a first piston ring, and the first bushing 40 and the first piston head are respectively connected to the first piston At both ends of a piston rod, the first piston ring is sleeved on the outer periphery of the first piston head, and the first piston head is slidably connected to the first cylinder 11 through the first piston ring; The second piston assembly 30 includes a second bushing, a second piston rod 31, a second piston head 32 and a second piston ring 33, the second bushing and the second piston head 32 are respectively connected to the At both ends of the second piston rod 31 , the second piston ring 33 is sleeved on the outer circumference of the second piston head 32 , and the second piston head 32 is slidably connected to the first piston through the second piston ring 33 . Inside the second cylinder 12 .

In one embodiment, a connecting ring extends outward from one end of the second cylinder 12 away from the second piston assembly 30 , and the connecting ring is in contact with the inner wall of the first cylinder 11 , so The outer diameter of the connecting ring is larger than the outer diameter of the rest of the second cylinder 12 .

In one of the embodiments, the cylinder assembly further includes a first end cover 13, a second end cover 14, and a sealing cover 15,

The first end cover 13 and the sealing cover 15 are sealed and connected to both ends of the first cylinder 11 respectively. A first through hole, the sealing cover 15 is provided with a second through hole matching the second cylinder 12 , the first through hole is sealingly connected with the second piston rod 31 , and the first through hole is sealed. The two through holes are sealingly connected to the second cylinder 12;

The second end cover 14 is provided with a third through hole matching with the first piston rod, and the third through hole is sealedly connected with the first piston rod.

In one embodiment, the cylinder assembly further includes a sealing ring 17 connected between the connecting ring and the end of the first cylinder 11 close to the second cylinder 12 .

In one embodiment, the outer diameter of the first piston assembly 20 is larger than the outer diameter of the second piston assembly 30 . Through this design, the damping rod can provide damping characteristics with different performances, and can meet the requirements of different connection strengths at both ends of the damping rod.

In one embodiment, both the first cylinder 11 and the second cylinder 12 are filled with damping medium. Specifically, the damping medium is compressed liquid.

In one embodiment, damping holes 34 are provided on both the end surface of the first piston head and the end surface of the second piston head 32 . The damping medium flows in the damping hole 34 , and the damping force is provided by the damping medium flowing through the damping hole 34 .

In one of the embodiments, the first bushing 40 and the second bushing are both vulcanized into one body by the outer sleeve 41 , the shock-absorbing rubber ring 42 and the inner sleeve 43 .

In one embodiment, each outer sleeve 41 is fixedly connected with each corresponding piston rod, and the central axis of each outer sleeve 41 is perpendicular to the central axis of each corresponding piston rod.

In one embodiment, the cylinder assembly further includes a plurality of arc springs 16 , and the parts of the second cylinder 12 connected to the first cylinder 11 are evenly distributed in the direction toward the second piston rod 31 There are several second protrusions, and the part connecting the first cylinder 11 and the second cylinder 12 is evenly distributed with a number of first protrusions matching the second protrusions, the arc spring 16 is connected between the first protrusion and the second protrusion. Specifically, a plurality of second protrusions are evenly distributed on the end surface of the connecting ring facing the second piston rod 31 , and the parts connecting the first cylinder 11 and the second cylinder 12 are evenly matched with each other. A number of first protrusions are arranged, and a number of the arc springs 16 are arranged between the first protrusion and the second protrusion, because the first cylinder 11 and the second cylinder 12 are not The rigid connection is the active connection, so that the connection between the first cylinder 11 and the second cylinder 12 can also play a shock absorption effect, thereby effectively damping the vibration generated by the torque.

In one embodiment, the arc-shaped spring 16 is an annular spring, and a plurality of balls pass through the arc-shaped spring 16 , and the balls are respectively connected to the inner wall of the first cylinder 11 and the second cylinder. 12, so as to improve the connection strength between the first cylinder 11 and the second cylinder 12 without affecting their shock absorption performance. Further, the arc-shaped spring 16 can effectively attenuate the torque to the damping rod to maintain stability, and at the same time, each outer sleeve 41 is connected with each corresponding piston rod through rod end joint bearings respectively.

In one of the embodiments, the first cylinder bore 11 communicates with the second cylinder bore 12 . This design enables the damping medium to flow between the two cylinders.

In one of the embodiments, the end of the second cylinder 12 provided with the connecting ring is also provided with a disc with a number of change-direction damping inclined holes, and the disc is fixed to the end of the second cylinder A plurality of the direction-changing damping inclined holes are evenly arranged around the center of the disc to form a first damping ring and a second damping ring that are arranged at intervals in multiple circles, and the inclination direction of the first damping ring is along the circular The center of the disc is inclined clockwise, the inclination direction of the second damping ring is counterclockwise along the center of the disc, and the direction-changing damping inclined hole of the first damping ring faces the direction of the first piston rod. The outer diameter of one end is larger than the outer diameter of one end of the first damping ring's direction-changing damping inclined hole facing the second piston rod, and the direction-changing damping inclined hole of the second damping ring is facing the second piston rod. The outer diameter of one end is larger than the outer diameter of the end of the second damping ring facing the first piston rod of the direction-changing damping inclined hole. Further, a balance hole is opened in the middle of the disc, and the diameter of the balance hole is twice the diameter of the damping hole 34 . By cooperating with the flowing damping medium, the obliquely arranged variable-direction damping slant holes with different diameters at both ends can effectively attenuate the torque received by the two cylinders so as to improve their torsional performance.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present invention, and the descriptions thereof are specific and detailed, but should not be construed as a limitation on the scope of the invention patent. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can also be made, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims (8)

1. A damping pull rod is characterized by comprising a cylinder barrel assembly, a first piston assembly, a second piston assembly, a first bushing and a second bushing, wherein the cylinder barrel assembly comprises a first cylinder barrel and a second cylinder barrel, one end of the second cylinder barrel is connected into the first cylinder barrel, the first piston assembly is connected with the inner wall of the first cylinder barrel in a sliding mode, the second piston assembly is connected with the inner wall of the second cylinder barrel in a sliding mode, the first bushing is connected to one end, far away from the first cylinder barrel, of the first piston assembly, the second bushing is connected to one end, far away from the second cylinder barrel, of the second piston assembly, and the first bushing and the second bushing are arranged oppositely; the cylinder barrel assembly further comprises a plurality of arc springs, a plurality of second bulges are uniformly distributed on the part, connected with the first cylinder barrel, of the second cylinder barrel in the direction towards the second piston assembly, a plurality of first bulges matched with the second bulges are uniformly distributed on the part, connected with the second cylinder barrel, of the first cylinder barrel, and the arc springs are connected between the first bulges and the second bulges; the first cylinder is communicated with the second cylinder.

2. The damping rod as claimed in claim 1, wherein the first piston assembly comprises a first piston rod, a first piston head and a first piston ring, the first bushing and the first piston head are respectively connected to two ends of the first piston rod, the first piston ring is sleeved on the outer periphery of the first piston head, and the first piston head is slidably connected in the first cylinder through the first piston ring; the second piston assembly comprises a second bushing, a second piston rod, a second piston head and a second piston ring, the second bushing and the second piston head are respectively connected to two ends of the second piston rod, the second piston ring is sleeved on the periphery of the second piston head, and the second piston head is connected into the second cylinder through the second piston ring in a sliding mode.

3. The damping brace of claim 2, wherein the cylinder assembly further comprises a first end cap, a second end cap, a seal cap,

the first end cover and the sealing cover are respectively connected to two ends of the first cylinder barrel, a first through hole matched with the first piston rod is formed in the first end cover, and a second through hole matched with the second cylinder barrel is formed in the sealing cover;

and a third through hole matched with the second piston rod is formed in the second end cover.

4. The damped rod of claim 1 wherein the outer diameter of said first piston assembly is greater than the outer diameter of said second piston assembly.

5. The tie rod of claim 2, wherein the first piston head has a dampening bore in an end face thereof and the second piston head has a dampening bore in an end face thereof.

6. The damping rod as claimed in claim 1, wherein the first bushing and the second bushing are vulcanized together by the outer sleeve, the cushion rubber ring and the inner sleeve.

7. The improvement as set forth in claim 6 wherein each outer sleeve is fixedly connected to a respective one of said piston rods, and wherein a central axis of each outer sleeve is perpendicular to a central axis of a respective one of said piston rods.

8. The damping drawbar of claim 1 wherein the first cylinder and the second cylinder are filled with damping medium.

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